How Communication Has Changed

• 1Long ago, people used letters to communicate.
• 2Today, we use phones and computers.
• 3Communication helps us share ideas and news.

1. 1844

   Samuel Morse sends a long-distance telegraph message

2. 1876

   The telephone is invented

3. 1920

   KDKA in Pittsburgh begins regular radio broadcasts

1. 1973

   Martin Cooper makes the first call on a handheld cell phone